2 Comments:

One is just one thing I did not quite get: I'm not sure what you mean by the judge being an old sprite. Are you referring to a low amount of colours?

As for you arguments: I'm sceptical about double-tapping with the stylus to allow a preview. I've seen it already in the Lost in Blue Series and it makes the interface seem just more sluggish and unresponsive. The gain of a preview doesn't seem justify that drawback, especially since it seems become a burden as you become familiar with the layout. I think the thumbnails you've shown do already a good job to make a preview unnecessary. Additionally, you could make sure there are simple means to undo a bad choice quickly to make navigation more forgiving.